How do I use a switch to set up FTP and allow the external network to access the internal network?

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1. Clarify the FTP service intranet.

Access the address port to ensure that the FTP service is normal and the connection can be accessed normally on the intranet.

2. Install the nat123 client on the intranet server and use it. Sign in with your account. Go to the main panel of Domain Name Resolution.

List Add a domain name.

3. Select dynamic DNS records and use free second-level domain names.

4. After adding dynamic resolution, check the status of the resolution in the domain name resolution list. Dynamically resolve domain names and local public IP addresses

Keep it corresponding. <>

5. Router port mapping, route-mapping, FTP service access port. Because the public IP is on the router, the external network.

To access the route, you need to route and map the port on the router to open the access port of the intranet FTP service. Router Port Mapping Location: Rule DMZ host.

Enable DMZ and add a FTP server that allows external access to the private network.

What is the intranet address of my FTP server.

6. When accessing the Internet, use dynamic domain name. When you access FTP over the Internet, you can use the dynamic DNS domain name to connect to the network.

<> the FileZilla Server interface.

Since this software is in English, it is an unfamiliar software that makes the configuration more difficult, to carry out a comprehensive configuration you need to have a certain network foundation, and then consult a large number of FTP server filezilla server configuration tutorials, because there are configuration details, such as port settings, thread settings, IP binding, etc.

In addition, if the company does not have a public IP, FTP access to the Internet is also a problem. If you are using FTP to share internal files, then building a cloud box is also a good choice. The construction process is simple and convenient, even if the computer is a small woman, you can quickly build a cloud box server, and give an intranet penetration service, without thinking about how to access the external network.

There's a setting in broadband routers, and some of them are called DMZ hosts. Or NAT mapping.

In this setting, fill in the IP address of the FTP server in your LAN and the service port (default 21) of the FTP setting in Save.

Then you can use FTP to connect to your broadband extranet IP, and then you can go to the inside of the local area network.

If the external IP obtained by your broadband is fixed, then you don't need to use software such as peanut shell.

If your address is on the intranet and the external network cannot be accessed, you must log in to the router to map the IP and port. The FTP port and the Internet port settings must also be the same, FTP defaults to port 21, add your IP in the port map of the route, that is, and fill in the port 21.

Method 2 1Install the nat123 software on the intranet.

2.Enable nat123. Add port mappings.

Select the application that you want to publish to the Internet from the internal network. Such as **Apply 80-port mapping, or other, or full port mapping for all applications. You can use your own top-level domain name, or you can use the second-level domain name prompted by default.

3.After the domain name is mapped, you can access it with the domain name. It's that simple, so that the external network can access the internal network.

1. FTP server under the router:

The FTP server under the router needs to solve a "security verification" problem, and the IE client will check the IP address of the server

address, because the server is an internal and external IP address, the security verification of the IE client fails, but the professional FTP client cuteftp9 and leapftp3

It is possible to make the access successful without checking the IP verification, but the user always prefers IE to be the client, so it is necessary to find a solution to the "security authentication".

FileZilla FTP Server is the most practical and compact FTP ideal server, only a little more than 1M, very small.

2. Factors for the FTP server under the router to be accessed by IE on the Internet:

1.On the FTP server, Windows computers should turn off the built-in firewall or set the FTP server program as "exception";

2.The computer server under the router should be set to the DMZ host of the router, so that the server port is. Open. Put it on the external network in order to be accessed by the external network, so the server computer should be set to a static IP such as , and put the router's.

The DMZ host is set to this IP, and you do not need to set it again after setting the DMZ. End. Mouth. Reflect. Shoot. Finish;

3.The FileZilla FTP Server needs to be set to passive PASV and a public IP address must be specified to solve the security verification of NAT.

otherwise, the client cannot be accessed by Windows IE, but can be accessed by Cuteftp;

4.The end of the extranet. The port cannot be blocked by the operator or cannot be the NAT** of the shared public IP address, and the port will be changed due to NAT.

Part 3: Required settings for FileZilla FTP Server:

1.Passive mode needs to be set: the port range can be set to 10000-10050

2.The specified IP address must be set to a foreign IP address to solve the security verification problem.

This external IP is the FTP that will be accessed: the external IP

3.The user adds anonymous, and the password is not set, which is anonymous;

4.Set the shared folder to one of your accessed directories;

5.Other default parameters, such as service port 21, do not need to be changed.

Fourth, the procedure description:

1. filezilla This is a background service program, which can be run and started by starting the service;

2. Filezilaa Server This is an interface management program that allows administrators to set parameters;

1.Is the FTP server connected directly to the Internet or through the router? If you go through the router, put the FTP server.

Set the DMZ host as the router so that the public network can directly access the FTP server.

2.To be accessible on the external network, the FTP server under the router must use a dedicated FTP client such as CuteFTP

etc., this is because IE and Explorer do FTP clients cannot access the FTP server under NAT, which is Windows.

A bug, the cause of the bug has been clarified.

You need to set up port mapping in the router, take TPLink WR886N as an example, and perform the following steps:

1. Open the browser and enter the default press enter to log in;

2. In the login dialog box, enter the password and click OK;

3. Click **Rules--Virtual Server, click to add new entry;

4. Enter the IP address of the intranet host that you are allowed to access, the port number that the host opens, select the transmission protocol, and click Save.

Do you want to be accessible on the Internet or do you want to be inaccessible on the Internet?

FTP can set a password and refuse anonymous access.

If the server has a public IP address, it can be accessed directly through the public IP address.

There are two situations when there is no extranet:

1. Home network.

If you don't have an external IP, you can first use the DMZ**21 port to the external network, and then use a product similar to peanut shell to do the external network mapping, so that you can access the FTP server of the internal network from the external network.

How to use peanut shells: Peanut shell tutorial documentation.

2. Cloud servers.

This requires the purchase of a public IP, which will take effect directly after purchasing it from your cloud service provider, and you can log in with the IP provided by the service provider.

There are indeed difficulties in this question, especially the road.

The FTP server under the server must be accessible by the Internet, and there are many problem versions to be solved.

The FTP port of the external network cannot be blocked;

The IP of the FTP server computer of the router (to be set as the DMZ host of the router (directly accessed by the external network);

Under the router NAT, the general FTP server cannot pass the security verification of the FTP client, but the filezilla FTP server I tried successfully today, and after turning off the Windows firewall of the FTP server computer, it was successfully accessed by the upper IE.

The FileZilla server should be set to passive mode (PASV) and specify an IP address that is accessed by the Internet as a secure reply.

IP address is key; Add an anonymous anonymous user and set up a shared directory;

This freeware is tiny, less than 2m, attached.

First of all, to create a virtual server (DMZ) in the router, go to the router web management interface to find it, point;

Then, install the SERV-U software on it to set up an FTP server.

I saw that your WAN port IP is an internal network IP, so it can't be connected.